Prospex Energy PLC (AIM:PXEN) fell 7% after announcing the potential sale of Warrego Energy's interests in Spanish assets.
Warrego is a co-owner of Tarba and the coventurer in the assets that Prospex holds in Spain, the investment company said in a statement.
"Should any deal be struck by Warrego the focus by any potential new owner is most likely to be on the asset base in Western Australia,” said chief executive Mark Routh.
“This may result in the disposal of Warrego's Spanish portfolio, which is in no way a reflection of the quality of the assets.”